Cleaning-tool



H. K. C. MAXSON.

CLEANING TOOL. APPLICATION FILED MAY 7. 1920.

1,373,141 Patented Mar. 29, 1921.

UNITED STATES HENRY K. C. MAISON, NEW YORK, N. Y.

CLEANING-T001 Toall whom it may concern Be it known that I, HENRY K. .C.MAX- SON, a citizen of the United States, and a resi-' tion is toproduce a simple, practical and inexpensive tool which can be used toadvantage in scraping and cleaning the inner ends of spark plugs so asto remove carbon or other .materials therefrom, and the tool is to thisend provided with a handle, and with blades extending from the oppos1teends thereof, one of the blades being prorided with a hook-shapedscraping end, and the other with a sharpened end projection, and bothbeing preferably narrow so that they can be readily inserted in thehollow end of a spark plug. Both the blades are made of flat metal,preferably tempered steel, so that hard carbon or other matter whichadheres closely to the lu can be removed readily, and one or ot of theblades serves as a gage, and to this end 18 made of a width for at leastpart of its length corresponding to the width of the proper gap betweenthe electrodes of the plug, so that by adjusting the points of theelectrodes in such a way that the dlstance between them will correspondto the gage represented by the width of the blade, a ap of right widthis had. While the too is particularly adapted, as will hereinafterappear, for cleaning spark plugs, and while this is its principal use,it is obvious that it can be used for very many other analogouspurposes. In carrying out the invention the blades can advantageousl bemade in one piece extending through 1; e handle and projecting from theends, as will hereinafter appear.

Reference is to be had to the accompanying drawings forming a part ofthis specification, in which similar reference characters indicatecorresponding parts in all the views.

Figure 1 is a side elevation of the tool giving an edge view of theblades, and

Fig. 2 is a plan view of the tool.

The tool is provided with a handle 5 which can be of any desired desiand of any suitable material, and exten ing from Specification ofLetters Patent.

Application filed Kay 7, 1920. Serial No. 379,489.

, dle ma Patented Mar. 29, 1921.

the ends of: thehandle are thin blades 6 and 7, the former being bent atan angle to its plane at the end as shown at 8, and the end edge issharpened so that the hook thus forme can be used to advantage inscraping the surface of aspark plug, or other surface to be cleaned ofclosely adhering material. The other blade 7 is cut as shown at 9 at itsedge, at an inclination of the axis of the blade, so that a narrowpointed edge is produced which can be used to advantage inpunchingmaterial loose or in other work of cleaning.

The bla es 6 and 7 can he advanta eousl made in one piece so as toextend t roug the handle 5 whichean be attached inany convenient way,and in order that the ban get a better rip upon the metal and ho d itmore firm y, it is advisable. to corrugate a part of the blade materialheld in the handle, as shown at 5* in Fig. 1.

At least one of the blades should be made of a thickness correspondingto the desired width of the sparkgap of the plug, which is usually about/1000 of an inch, so that the electrode points when spaced the width ofthe blade will be the desired distance for a proper ap.

From t e foregoin description it will be seen that I thus pro uce a verysimple and inexpensive tool which is compact, easily carried about, andwell adapted to its intended purpose.

Attention iscalled to the fact that the handle 5 should be made ofsuitable insulating material so that in working around electricconductors the operator would not get a shock. I claim 1-- 1. A tool ofthe kind described comprising an insulating handle, and scraping bladesprojecting from the'o posite ends of thehandle, one of said bla eshaving a scraping ed e at the end thereof inclined to the engt of theblade, and the-other blade being bent at an angle to the plane of theblade to form a scraping book.

Q ev/3,141

ble metal extending through the handle and to form scraping blades, thestrip of metal I pr'ojectin from each of the ends thereof to beingcorrugated for a part of its length 10 form 511a es, the ends of saidblades being lying within the handle.

orme into scra ers.

5 4. A tool of tl ie kind described com ris HENRY MAXSON' ing aninsulating handle, and a strip offlat Witnesses: flexible metalextending through the handle WARREN B. HUTGHINSON, and projecting fromeach of the ends thereof I M. G. ODONNELL.

